Petrosamine B, an Inhibitor of the Helicobacter pylori Enzyme Aspartyl Semialdehyde Dehydrogenase from the Australian Sponge Oceanapia sp.
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Ngo, A
Quinn, RJ
Redburn, J
Hooper, JNA
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Abstract
Bioassay-guided fractionation of the MeOH extract of the sponge Oceanapia sp. using the Helicobacter pylori enzyme, aspartyl semialdehyde dehydrogenase, ASD, to detect antibacterial activity, led to the isolation of a new pyridoacridine alkaloid, petrosamine B (1). Petrosamine B is a bright blue compound that is sparingly soluble in many organic solvents. The structure of 1 was determined from detailed NMR studies performed in TFA/D2O. Petrosamine B was found to be a weak inhibitor of ASD with an IC50 of 306 卮
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Journal of Natural Products
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68
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5
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© 2005 American Chemical Society. Self-archiving of the author-manuscript version is not yet supported by this publisher. Please use the hypertext link above to access the journal's website or contact the author for more information.
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Chemical sciences
Biological sciences
Biomedical and clinical sciences
Traditional, complementary and integrative medicine